Can anyone help me with this question?
Calculate the number of free electrons per metre length of wire if a current of 2.0A produces a drift velocity of 1.0 * 10^-3 ms^-1
I know the answer but I don't understand the method on how to get to it.
x Turn on thread page Beta
plz help watch
- Thread Starter
You have an equation for drift velocity, usually in the form
I = nAqv
In this equation, n is the nº of electrons per unit volume. You've been asked for nº per unit length.
Suppose N is the total number so n = N/vol and Vol of course = length x area
So n = N/(LxA) If you multipy both sides by A (or take the A to the other side)
nA = N/L or in otherwords, nA = number of electrons per unit length.Last edited by phys981; 1 week ago at 23:30.